X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FAttribute.pm;h=65d6daf77999218c1ee62f1ae9446fce6579488c;hb=11d415286701d3b51e517cb6826138808967cb89;hp=f462adda41bdc36c94b0f5cbb34b8498ef4d120a;hpb=eec1bb49cc5fcd39b8923dfc56ca568359122784;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Meta/Attribute.pm b/lib/Mouse/Meta/Attribute.pm
index f462add..65d6daf 100644
--- a/lib/Mouse/Meta/Attribute.pm
+++ b/lib/Mouse/Meta/Attribute.pm
@@ -1,105 +1,114 @@
-#!/usr/bin/env perl
 package Mouse::Meta::Attribute;
 use strict;
 use warnings;
-require overload;
 
 use Carp 'confess';
-require Mouse::Util;
+use Scalar::Util ();
+use Mouse::Meta::TypeConstraint;
 
 sub new {
-    my $class = shift;
-    my %args  = @_;
+    my ($class, $name, %options) = @_;
 
-    my $name = $args{name};
+    $options{name} = $name;
 
-    $args{init_arg} = $name
-        unless exists $args{init_arg};
+    $options{init_arg} = $name
+        unless exists $options{init_arg};
 
-    $args{is} ||= '';
+    $options{is} ||= '';
 
-    bless \%args, $class;
+    bless \%options, $class;
 }
 
-sub name              { $_[0]->{name}             }
-sub associated_class  { $_[0]->{associated_class} }
-sub _is_metadata      { $_[0]->{is}               }
-sub is_required       { $_[0]->{required}         }
-sub default           { $_[0]->{default}          }
-sub is_lazy           { $_[0]->{lazy}             }
-sub is_lazy_build     { $_[0]->{lazy_build}       }
-sub predicate         { $_[0]->{predicate}        }
-sub clearer           { $_[0]->{clearer}          }
-sub handles           { $_[0]->{handles}          }
-sub is_weak_ref       { $_[0]->{weak_ref}         }
-sub init_arg          { $_[0]->{init_arg}         }
-sub type_constraint   { $_[0]->{type_constraint}  }
-sub trigger           { $_[0]->{trigger}          }
-sub builder           { $_[0]->{builder}          }
-sub should_auto_deref { $_[0]->{auto_deref}       }
-sub should_coerce     { $_[0]->{should_coerce}    }
-
-sub has_default         { exists $_[0]->{default}         }
-sub has_predicate       { exists $_[0]->{predicate}       }
-sub has_clearer         { exists $_[0]->{clearer}         }
-sub has_handles         { exists $_[0]->{handles}         }
-sub has_type_constraint { exists $_[0]->{type_constraint} }
-sub has_trigger         { exists $_[0]->{trigger}         }
-sub has_builder         { exists $_[0]->{builder}         }
-
-sub find_type_constraint      { $_[0]->{find_type_constraint}  }
-sub type_constraint_as_string {
-    ref($_[0]->{type_constraint}) eq 'ARRAY' ? join '|', @{ $_[0]->{type_constraint} } : $_[0]->{type_constraint}
+sub name                 { $_[0]->{name}                   }
+sub associated_class     { $_[0]->{associated_class}       }
+sub _is_metadata         { $_[0]->{is}                     }
+sub is_required          { $_[0]->{required}               }
+sub default              { $_[0]->{default}                }
+sub is_lazy              { $_[0]->{lazy}                   }
+sub is_lazy_build        { $_[0]->{lazy_build}             }
+sub predicate            { $_[0]->{predicate}              }
+sub clearer              { $_[0]->{clearer}                }
+sub handles              { $_[0]->{handles}                }
+sub is_weak_ref          { $_[0]->{weak_ref}               }
+sub init_arg             { $_[0]->{init_arg}               }
+sub type_constraint      { $_[0]->{type_constraint}        }
+sub find_type_constraint {
+    Carp::carp("This method was deprecated");
+    $_[0]->type_constraint();
 }
+sub trigger              { $_[0]->{trigger}                }
+sub builder              { $_[0]->{builder}                }
+sub should_auto_deref    { $_[0]->{auto_deref}             }
+sub should_coerce        { $_[0]->{should_coerce}          }
+
+sub has_default          { exists $_[0]->{default}         }
+sub has_predicate        { exists $_[0]->{predicate}       }
+sub has_clearer          { exists $_[0]->{clearer}         }
+sub has_handles          { exists $_[0]->{handles}         }
+sub has_type_constraint  { exists $_[0]->{type_constraint} }
+sub has_trigger          { exists $_[0]->{trigger}         }
+sub has_builder          { exists $_[0]->{builder}         }
 
 sub _create_args {
     $_[0]->{_create_args} = $_[1] if @_ > 1;
     $_[0]->{_create_args}
 }
 
-sub inlined_name {
+sub _inlined_name {
     my $self = shift;
-    my $name = $self->name;
-    my $key   = "'" . $name . "'";
-    return $key;
+    return sprintf '"%s"', quotemeta $self->name;
 }
 
-sub generate_accessor {
-    my $attribute = shift;
+sub _generate_accessor{
+    my ($attribute) = @_;
 
     my $name          = $attribute->name;
     my $default       = $attribute->default;
-    my $type          = $attribute->type_constraint_as_string;
-    my $constraint    = $attribute->find_type_constraint;
+    my $constraint    = $attribute->type_constraint;
     my $builder       = $attribute->builder;
     my $trigger       = $attribute->trigger;
     my $is_weak       = $attribute->is_weak_ref;
     my $should_deref  = $attribute->should_auto_deref;
     my $should_coerce = $attribute->should_coerce;
 
+    my $compiled_type_constraint    = $constraint ? $constraint->{_compiled_type_constraint} : undef;
+
     my $self  = '$_[0]';
-    my $key   = $attribute->inlined_name;
+    my $key   = $attribute->_inlined_name;
 
-    my $accessor = "sub {\n";
+    my $accessor = 
+        '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+        "sub {\n";
     if ($attribute->_is_metadata eq 'rw') {
-        $accessor .= 'if (scalar(@_) >= 2) {' . "\n";
+        $accessor .= 
+            '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+            'if (scalar(@_) >= 2) {' . "\n";
 
         my $value = '$_[1]';
 
         if ($constraint) {
-            $accessor .= 'my $val = ';
             if ($should_coerce) {
-                $accessor .= '$attribute->coerce_constraint('.$value.');';
+                $accessor .=
+                    "\n".
+                    '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                    'my $val = Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');';
+                $value = '$val';
+            }
+            if ($compiled_type_constraint) {
+                $accessor .= 
+                    "\n".
+                    '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                    'unless ($compiled_type_constraint->('.$value.')) {
+                        $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
+                    }' . "\n";
             } else {
-                $accessor .= $value.';';
+                $accessor .= 
+                    "\n".
+                    '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                    'unless ($constraint->check('.$value.')) {
+                        $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
+                    }' . "\n";
             }
-            $accessor .= 'local $_ = $val;';
-            $accessor .= '
-                unless ($constraint->()) {
-                    my $display = defined($_) ? overload::StrVal($_) : "undef";
-                    Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
-            }' . "\n";
-            $value = '$val';
         }
 
         # if there's nothing left to do for the attribute we can return during
@@ -109,17 +118,17 @@ sub generate_accessor {
         $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n";
 
         if ($is_weak) {
-            $accessor .= 'Mouse::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
+            $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
         }
 
         if ($trigger) {
-            $accessor .= '$trigger->('.$self.', '.$value.', $attribute);' . "\n";
+            $accessor .= '$trigger->('.$self.', '.$value.');' . "\n";
         }
 
         $accessor .= "}\n";
     }
     else {
-        $accessor .= 'confess "Cannot assign a value to a read-only accessor" if scalar(@_) >= 2;' . "\n";
+        $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
     }
 
     if ($attribute->is_lazy) {
@@ -134,8 +143,7 @@ sub generate_accessor {
     }
 
     if ($should_deref) {
-        my $type_constraint = $attribute->type_constraint;
-        if (!ref($type_constraint) && $type_constraint eq 'ArrayRef') {
+        if (ref($constraint) && $constraint->name =~ '^ArrayRef\b') {
             $accessor .= 'if (wantarray) {
                 return @{ '.$self.'->{'.$key.'} || [] };
             }';
@@ -151,13 +159,14 @@ sub generate_accessor {
     }';
 
     my $sub = eval $accessor;
-    confess $@ if $@;
+    Carp::confess($@) if $@;
     return $sub;
 }
 
-sub generate_predicate {
+
+sub _generate_predicate {
     my $attribute = shift;
-    my $key = $attribute->inlined_name;
+    my $key = $attribute->_inlined_name;
 
     my $predicate = 'sub { exists($_[0]->{'.$key.'}) }';
 
@@ -166,9 +175,9 @@ sub generate_predicate {
     return $sub;
 }
 
-sub generate_clearer {
+sub _generate_clearer {
     my $attribute = shift;
-    my $key = $attribute->inlined_name;
+    my $key = $attribute->_inlined_name;
 
     my $clearer = 'sub { delete($_[0]->{'.$key.'}) }';
 
@@ -177,7 +186,7 @@ sub generate_clearer {
     return $sub;
 }
 
-sub generate_handles {
+sub _generate_handles {
     my $attribute = shift;
     my $reader = $attribute->name;
     my %handles = $attribute->_canonicalize_handles($attribute->handles);
@@ -189,7 +198,7 @@ sub generate_handles {
 
         my $method = 'sub {
             my $self = shift;
-            $self->$reader->$remote_method(@_)
+            $self->'.$reader.'->'.$remote_method.'(@_)
         }';
 
         $method_map{$local_method} = eval $method;
@@ -212,61 +221,56 @@ sub create {
         if exists $args{coerce};
 
     if (exists $args{isa}) {
+        confess "Got isa => $args{isa}, but Mouse does not yet support parameterized types for containers other than ArrayRef and HashRef (rt.cpan.org #39795)"
+            if $args{isa} =~ /^([^\[]+)\[.+\]$/ &&
+               $1 ne 'ArrayRef' &&
+               $1 ne 'HashRef'  &&
+               $1 ne 'Maybe'
+        ;
+
         my $type_constraint = delete $args{isa};
-        $type_constraint =~ s/\s//g;
-        my @type_constraints = split /\|/, $type_constraint;
-
-        my $code;
-        my $optimized_constraints = Mouse::TypeRegistry->optimized_constraints;
-        if (@type_constraints == 1) {
-            $code = $optimized_constraints->{$type_constraints[0]} ||
-                sub { Mouse::Util::blessed($_) && Mouse::Util::blessed($_) eq $type_constraints[0] };
-            $args{type_constraint} = $type_constraints[0];
-        } else {
-            my @code_list = map {
-                my $type = $_;
-                $optimized_constraints->{$type} ||
-                    sub { Mouse::Util::blessed($_) && Mouse::Util::blessed($_) eq $type }
-            } @type_constraints;
-            $code = sub {
-                for my $code (@code_list) {
-                    return 1 if $code->();
-                }
-                return 0;
-            };
-            $args{type_constraint} = \@type_constraints;
-        }
-        $args{find_type_constraint} = $code;
+        $args{type_constraint}= Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($type_constraint);
     }
 
-    my $attribute = $self->new(%args);
+    my $attribute = $self->new($name, %args);
 
     $attribute->_create_args(\%args);
 
     $class->add_attribute($attribute);
 
+    my $associated_methods = 0;
+
+    my $is_metadata = $attribute->_is_metadata || '';
+
     # install an accessor
-    if ($attribute->_is_metadata eq 'rw' || $attribute->_is_metadata eq 'ro') {
-        my $accessor = $attribute->generate_accessor;
-        $class->add_method($name => $accessor);
+    if ($is_metadata eq 'rw' || $is_metadata eq 'ro') {
+        my $code = $attribute->_generate_accessor();
+        $class->add_method($name => $code);
+        $associated_methods++;
     }
 
     for my $method (qw/predicate clearer/) {
         my $predicate = "has_$method";
         if ($attribute->$predicate) {
-            my $generator = "generate_$method";
+            my $generator = "_generate_$method";
             my $coderef = $attribute->$generator;
             $class->add_method($attribute->$method => $coderef);
+            $associated_methods++;
         }
     }
 
     if ($attribute->has_handles) {
-        my $method_map = $attribute->generate_handles;
+        my $method_map = $attribute->_generate_handles;
         for my $method_name (keys %$method_map) {
             $class->add_method($method_name => $method_map->{$method_name});
+            $associated_methods++;
         }
     }
 
+    if($associated_methods == 0 && $is_metadata ne 'bare'){
+        confess(qq{Attribute ($name) of class }.$class->name.qq{ has no associated methods (did you mean to provide an "is" argument?)});
+    }
+
     return $attribute;
 }
 
@@ -315,8 +319,7 @@ sub validate_args {
 
     confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)"
         if $args->{auto_deref}
-        && $args->{isa} ne 'ArrayRef'
-        && $args->{isa} ne 'HashRef';
+        && $args->{isa} !~ /^(?:ArrayRef|HashRef)(?:\[.*\])?$/;
 
     if ($args->{trigger}) {
         if (ref($args->{trigger}) eq 'HASH') {
@@ -330,26 +333,26 @@ sub validate_args {
     return 1;
 }
 
-sub verify_type_constraint {
-    my $self = shift;
-    local $_ = shift;
+sub verify_against_type_constraint {
+    my ($self, $value) = @_;
+    my $tc = $self->type_constraint;
+    return 1 unless $tc;
 
-    my $type = $self->type_constraint_as_string
-        or return 1;
-    my $constraint = $self->find_type_constraint;
+    local $_ = $value;
+    return 1 if $tc->check($value);
 
-    return 1 if $constraint->($_);
+    $self->verify_type_constraint_error($self->name, $value, $tc);
+}
 
-    my $name = $self->name;
-    my $display = defined($_) ? overload::StrVal($_) : 'undef';
-    Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
+sub verify_type_constraint_error {
+    my($self, $name, $value, $type) = @_;
+    Carp::confess("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
 }
 
-sub coerce_constraint {
-    my($self, $value) = @_;
-    my $type = $self->type_constraint
-        or return $value;
-    return Mouse::TypeRegistry->typecast_constraints($self->associated_class->name, $self->find_type_constraint, $type, $value);
+sub coerce_constraint { ## my($self, $value) = @_;
+    my $type = $_[0]->{type_constraint}
+        or return $_[1];
+    return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->type_constraint, $_[1]);
 }
 
 sub _canonicalize_handles {
@@ -455,28 +458,7 @@ installed. Some error checking is done.
 
 Informational methods.
 
-=head2 generate_accessor -> CODE
-
-Creates a new code reference for the attribute's accessor.
-
-=head2 generate_predicate -> CODE
-
-Creates a new code reference for the attribute's predicate.
-
-=head2 generate_clearer -> CODE
-
-Creates a new code reference for the attribute's clearer.
-
-=head2 generate_handles -> { MethodName => CODE }
-
-Creates a new code reference for each of the attribute's handles methods.
-
-=head2 find_type_constraint -> CODE
-
-Returns a code reference which can be used to check that a given value passes
-this attribute's type constraint;
-
-=head2 verify_type_constraint Item -> 1 | ERROR
+=head2 verify_against_type_constraint Item -> 1 | ERROR
 
 Checks that the given value passes this attribute's type constraint. Returns 1
 on success, otherwise C<confess>es.